Actually, the perception that U.S. gun violence is "out of control" is largely a media construct. Certainly, looking at
these figures, the U.S. firearm homicide rate is higher compared to European nations that have banned firearms. Nonetheless, in many cases, the non-firearm homicide rate is much higher accordingly so that the overall homicide statistics are actually worse in many nations compared to the U.S. I do not doubt that if we were to successfully rid the U.S. of all guns that many homicides would shift from firearms to other weapons.
Why homicides happen at all appear to be motivated by other circumstances (socioeconomic/cultural, etc.), rather than the presence or lack thereof of firearms.